(n): the line or plane indicating the limit or extent of something
(n): a line determining the limits of an area
(n): a length (straight or curved) without breadth or thickness; the trace of a moving point
(n): a sharp side formed by the intersection of two surfaces of an object
(n): an extended outer surface of an object
(n): the attribute of urgency in tone of voice
(n): pressing importance requiring speedy action
(n): a slight competitive advantage
(n): the quality of being at a competitive advantage
(n): the outside limit of an object or area or surface; a place farthest away from the center of something
(n): the boundary of a specific area
(v): advance slowly, as if by inches
(v): move forward, also in the metaphorical sense
(v): provide with a border or edge
(v): give something useful or necessary to
(v): lie adjacent to another or share a boundary
(v): be in direct physical contact with; make contact
(v): provide with an edge
(v): make sharp or sharper
I wonder how this came to mean an advantage in sport etc?
In bookbinding, any of the three outer sides of the text block when a book is closed.